AA 1255 then AA 1225 at Miami
Kansas City → Miami → Boston
Timetable, Miami time
09:15AA 1255 from Kansas City at the gate
09:13AA 1225 to Boston leaves the gate
23 h 58 apart on the timetable, overnight
AA 1225 leaves 23 h 58 after AA 1255 arrives on the timetable: more than half a day, so not a connection we count.